Cell and electronic device having same

EP4738588A3Pending Publication Date: 2026-06-17NINGDE AMPEREX TECHNOLOGY LTD
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Patent Information

Application Number
EP2026166662
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2020-03-30
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Current battery cells face safety issues due to declining thermal stability and potential hazards from increased voltage and energy density, leading to failures in safety tests.

Method used

A battery cell design featuring a packaging bag with a sealing zone containing a weak zone that reduces packaging tension at a predetermined temperature range, allowing gas release to the outside, thereby reducing heat accumulation and deformation.

Benefits of technology

Enhances safety performance by releasing heated gas and preventing deformation, thus avoiding short circuits and fires.

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Abstract

A battery cell, including an electrode assembly and a packaging bag, where the electrode assembly includes a tab, the packaging bag is configured to accommodate the electrode assembly, a sealing zone is formed on a periphery of the packaging bag, one end of the tab is electrically connected to a body of the electrode assembly, and the other end of the tab protrudes out of the sealing zone; the sealing zone is provided with a weak zone, and in a predetermined temperature range, a packaging tension of the weak zone in the packaging bag reduces to release gas inside the battery cell to the outside of the battery cell. This application further discloses an electronic apparatus, including a battery, where the battery includes a battery cell and a housing accommodating the battery cell, and the battery cell includes the foregoing battery cell.
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Citation Information

Patent Citations

  • Flat battery

    JP2001093489A

  • Secondary battery, component for the same and method for manufacturing the same

    US20140011060A1